"I love his music, and he's a super cool guy, and he's genuine. I respect his decisions, and we have the same feelings about trying to be true in your art," the musician said. "It just happens that one of us is a nerd and the other is the coolest multi-entrepreneur on the planet."

Martin continued: "I think more people wonder why he's friends with me. Of course, I want to be friends with Jay-Z - he's cool as f**kâ€¦ In Britain, they're like, 'How are you friends with Jay-Z?' It's almost like they're jealous.

"It's the same with my wife [Gwyneth Paltrow], 'How the f**k did you manage to do that?' And my answer is, 'I have no idea!'"

The Coldplay singer went on to say that he and Jay-Z share a number of common interests, including American football.

"We do play touch football. He's very good at American football - not only does he have all these other talents, but he can throw a perfect spiral," Martin quipped. "Then, on the other end, it smacks me in the head. In England, no-one teaches you how to throw a spiral, so mine looks like an egg slowly limping through the air."

Martin previously revealed that he is jealous of Jay-Z, Adele and Lady GaGa's songwriting ability.